Just like any other C function from any other C++ application.
Just a side note, as far as I know ffmpeg will not let you record audio. It's a set of libraries related to coding/decoding audio and video. You need the actual audio data to be there already.
Your biological and technological distinctiveness will be added to our own. Resistance is futile.
Please ask Qt related questions on the forum and not using private messages or visitor messages.
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